There are lots of these
sluiced gullies scattered around the bush in my part of Victoria (australia).
These were made by gold miners in the 19th century. They forced water
through these gullies to erode away the sides then sifted the sludge for
gold. great.
I was playing here with simply making the association with the mechanical
forces of water and these puzzling landscape features.
Filmed on K40 super 8. I recorded the sounds in my dark room laboratory.